Fan



`July 19,- `1949- s. M; BERNsTElN v FAN 2 Sheets-Sheet l Filed D60. 18,1947 S. M. BERNSTEIN July 19 1949.

FAN

2 Sheets-Sheet 2 Filed Deo. 18, 1947 Patented July 19, 1949 FAN SamuelM. Bernstein, Chicago, lll. e Application December 18, 1947, Serial No.792,561

5 Claims. (Cl. 23o-273) The invention -relates to fans and moreparticularly to fans which are installed in a wall opening or window. Itis an object of the invention to provide a fan which may be selectivelyemployed either as a Ventilating or exhaust fan.

A further object constitutes the provision of means for convenientlyconverting the ventilating fan into an exhaust fan and vice versa.

It is a further object to provide means extraneous to the housing of thefan to arrange the fan for ventilation or exhaust.

It is also an object to provide certain features of construction andarrangement of parts tend.- ing to enhancepthe utility and eillciency ofa device of the character specified.

With these and other objects in view which will become apparent from adisclosure of the invention, the latter comprises the means described inthe following specication particularly pointed out in the claims forminga part thereof, and illustrated in the accompanying drawing, in whichFig. 1 is a front view of a fan constructed in accordance with myinvention.

Fig. 2 is a rear view.

Fig. 3 is a top plan view.

Fig. 4 is an enlarged section on the line 4-4 of Fig. 1.

Fig. 5 is a partial Itop plan view as from line 5-5 of Fig. 4, and

Fig. 6 is an isometric view of the upperv end of the supporting shaft.

Fig. '7 is a top plan view of a modification.

Fig'. 8 is a section on the line 8-8 of Fig. 7 on a reduced scale, and

Fig. 9 is an isometric view of the upper end of the supporting shaft. i

Referring to the several views in the drawing I vdesignates a wall platewhich at itsouterend is bent at right angles to provide a ange I I. Theterminal end of said ange is folded upon itself as at I2 to overlap aange I3 of reinforcing plates I4. The plates I4 have large'semi-circular cut-out portions l at the meeting edges to provide acircular opening for a purpose presently to be described. The plates I4may be secured to the wall plate I0 by screws or rivets I4a.

The wall plate I0 is formed with a' large circular opening I6 and theedge of said opening is bent `outwardly to provide a circumferentialflange Il. The opening dened by the reinforcing plates I4 and theopening I6 are concentric.

A casing I8 is secured to the wall plate by being 2 provided with flangeI 9 which is welded or brazed to the wall plate I0.

A motor 20 is positioned within the opening I6 and protrudes beyond thevertical plane defined by the outer edge of flange lI I.

Straps r2| and 22 .surround the casing of the motor and are securedtogether at appertaining ends by bolts 23. A supporting rod or shaft 24is welded or brazed to the upper strap 2l. The shaft 24 rises from thestrap in vertical direction and is oifset inwardly to form a knee 25 andthence continues in vertical direction. To the upper end of shaft 24 isrigidly secured a link or arm 26 fromv which rises a bolt 27 projectingthrough an arcuate slot 28 in the top of the casing 8 dening asemi-circle. The bolt 21 is threaded at the top to receive a nut 29lwhich permits the shaft to be locked in adjusted position.

To the strap 22 a shaft 30 is secured by Welding or brazing which isalso offset to form a knee 3| and thence continues vertically downwardlyin registry with the inner portion of shaft 24. The shaft 30 isjournalled in a grommet 32 held by a bracket 33'.

The shaft 34 of the motor 20 continues inwardly to carry a fan 35 whichas shown in Fig. 4 when occupying the full line position acts as aVentilating fan. The nut 29 then is in the position shown in Fig. 5.

If it is desired to operate the fan as a suction or exhaust fan. the nut29 is loosened and moved counterclockwise whereby shafts 24 the fan toin Fig. 4.

The casing I8 is open at the sides and front and has a screen 36 for thepassage of air.

It is evident that the fan is supported to rotate about a vertical axisparallel to the central longi tudinal axis of the fan blades so that theian blades normally rotate about horizontal axis and may be also movingaround' about a vertical axis.

and 39 by the crank arm 26,- causing occupy the `dotted line positionshown The modification shown in Figs. 7 to 9 differs from the previouslydescribed embodiment therein that the crank shaft is dispensed with andin-lieu thereof a straight shaft employed.

As shown, the motor 36 is surrounded by straps 31 and 38 whichareseoured together at appertainingV ends by bolts 39.

Vertical shafts 40 .and 4I arerespectively secured by welding or brazingto the straps 3l and 38..

To the motor shaft 42 is secured a fan 43. The casing 44 has an arcuateslot 45 in which is rotation is imparted to guided a bolt 46 rising froma horizontal arm' 3 I1 which is below the upper casina wall and isrigidly secured to the shaft 40. The end of the bolt protruding from thecasing carries a nut It.

It is evident that upon moving the arm throughout the slot 25, the motorwill be turned about 180 so that the fan instead of the full lineposition will be reversed to occupy the dotted line position shown inFig. 8.

While the drawing shows two embodiments of the invention, numerouschanges and alterations may be made without departing from the spirit ofthe invention.

I, therefore, do not linut myself to details of construction orarrangement oi parts, as shown. but wish to include all modications andrevisions constituting departures within the scope of the invention, asdefined in the appended claims.

I claim:

1. In a fan, a housing surrounding said fan, a crank shaft secured tosaid ian, means for rotatably supporting said crank shaft in saidhousing, a crank arm secured to one end of said crank shaft and a bolton the free end of said arm and projecting through an arcuate slot insaid housing.

2. In a fan, a housing surrounding said Ian, a rod supporting said fanremoved from the blade carrying end, an arm secured to one end oisaidrod. and a -bolt extending from the free end of,

said arm through an arcuate slot in said housing.

3. In a reversible fan, a casing, a U-shaped rod having oiset ends eachmounted in an opposite wall portion oi said casing whereby to aiord atrunnion, a fan unit mounted in the bight portion of said rod trunnion,a crank connected to one of said onset ends, an arcuate slot in the wallof said housing adjacent said crank, and a crankoperating elementprojecting from said crank through said slot for manual access -torotate the trunnion.

4. In a reversible fan structure, a casing. a pair of complimentary yokepieces formed to clamp a ian unit therebetween, a rod secured to eachsaid yoke piece and each said rod having an onset end portion, means forclamping said yokes together to secure a ian unit as aforesaid, withsaid rods defining a trunnion, said onset rod end portion beingpivotally mounted in opposite wail portion of said casing whereby saidian unit may be rotated by said trunnion to reverse the air iiow.

5. The structure defined in claim 4 and further characterized in thatone of said offset rod ends is provided with a crank having a radiallydisposed handle member projecting through an arcuate slot in anadjoining wall portion of said housing for manual engagement tooscillate said t'runnion between reverse positions.

SAMUEL M. BERNSTEIN.

REFERENCES CITED The following references are of record in the ille ofthis patent:

UNITED STATES PATENTS

